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File wiki/src/security/Iceweasel_exposes_a_rare_User-Agent.bg.po was added. 3 weeks ago
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Torbutton 1.2.5, included in T(A)ILS 0.5
 
3 weeks ago
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Affected versions
 
3 weeks ago
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Beware! Changing this setting in the Torbutton preferences window is **not** effective.
 
3 weeks ago
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... then save and quit. You can now run Iceweasel.
 
3 weeks ago
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user_pref("extensions.torbutton.spoof_english", false);
 
3 weeks ago
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... this opens a text editor. Delete the line that says:
 
3 weeks ago
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gksudo gedit /etc/iceweasel/profile/user.js
 
3 weeks ago
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Run the following command in a terminal:
 
3 weeks ago
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The following steps need to be done immediately after boot, **before** running Iceweasel.
 
3 weeks ago
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Mitigation on T(A)ILS 0.5
 
3 weeks ago
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Upgrade to T(A)ILS 0.6.
 
3 weeks ago
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Solution
 
3 weeks ago
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The client IP address recorded in the webserver logs for such a connection is the one of the Tor exit node used by the T(A)ILS user at this time.
 
3 weeks ago
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While T(A)ILS users are obviously not the only ones in this case, such a bug eases fingerprinting.
 
3 weeks ago
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System administrators, webmasters and anyone able to read the logs of a website are able to single out, amongst the visitors, the ones that are using an affected Torbutton extension *and* have explicitly disabled the "Spoof US English Browser" setting.
 
3 weeks ago
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Impact
 
3 weeks ago
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A Torbutton bug ([[!debbug 595375]]) makes Iceweasel expose a recognizable User-Agent when the "Spoof US English Browser" setting is disabled, which is the case in T(A)ILS 0.5.
 
3 weeks ago
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[[!tag security/fixed]]
 
3 weeks ago
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[[!pagetemplate template="news.tmpl"]]
 
3 weeks ago

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